My quest for a 9, I failed.

You definitely need more fuel pressure. Ive always been set it at 7 and been 5 in the lights.

That statement is not true. I felt the same way, only i was running 9 psi thinking i would keep more fuel in the bowl.
I did sever tests to Prove a member on here was DEAD WRONG on less pressure keep the fuel bowl full.

I set up buckets, valves, measuring devices and proceeded to prove him wrong!!!!!
What i found out was that at 6 psi i gained a lot more volume then i did at 9 psi.
Completely backward from what i be leaved!